Health and Medicine

Research and findings related to human health, diseases, treatments, and the psychological aspects of health and wellness.

Why Do Pupils Dilate? Understanding Eye Responses to Light and Emotion

Person studying in sunlit home office with map.

The size of our pupils constantly adjusts in response to environmental stimuli and physiological changes to optimize vision and protect the retina. Understanding the dynamics of pupil dilation, or mydriasis, reveals the complexities of how the human eye interacts with light and processes emotions.